#include<bits/stdc++.h>

using namespace std;

long long cnr(int n, int r) {
    if (r == 0 || n == r)return 1;
    return cnr(n - 1, r - 1) + cnr(n - 1, r);

}

int main() {
    cout << cnr(28, 14) << endl;

    return 0;
}
